<template>
  <view>
    <view class="search-box">
      <uni-search-bar  placeholder="请输入搜索内容" @input="input" :radius="100" cancelButton="none" ></uni-search-bar>
    </view>
    <!-- 搜索建议栏-->
    <view class="sugg-list" v-if="searchResult.length!==0">
        <view class="sugg-item" v-for="(item,index) in searchResult" :key="index" @click="gotoDetail(item.goods_id)">
          <view class="good_name">
            {{item.goods_name}}
          </view>
          <uni-icons type="arrow-right" size="16"></uni-icons>
        </view>
    </view>
    <!-- 搜索历史-->
    <view class="history-box" v-else> 
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
      </view>
      <!-- 列表区域-->
      <view class="history-list">
        <uni-tag :text="item" v-for="(item,i) in historys" :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
    
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer:null,
        kw:'',
        //搜索结果列表
        searchResult:[],
        //搜索关键词的历史记录
        historyList:[]
      };
    },
    computed:{
      historys(){
        return [...this.historyList].reverse()
      }
    },
    methods:{
      input(e){
        clearTimeout(this.timer)
        this.timer = setTimeout(()=>{
          console.log(e)
          this.kw = e
          this.getSearchResult()
        },500)
      },
      async getSearchResult(){
        if(this.kw.length===0){
          this.searchResult =[]
          return 
        }
       // 发起请求，获取搜索建议列表
         const { data: res } = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
       if(res.meta.status!==200) return uni.$showMsg()
       this.searchResult = res.message
       this.saveSearchHistory()
      },
      gotoDetail(good_id){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?good_id='+good_id
        })
      },
      saveSearchHistory(){
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList = Array.from(set)
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      onLoad() {
        this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
      },
      cleanHistory(){
        this.historyList=[]
        uni.setStorageSync('kw','[]')
      },
      gotoGoodsList(kw){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query='+kw
        })
      }
    }
  }
</script>

<style lang="scss">
  .search-box{
    position: sticky;
    top: 0;
    z-index: 999;
  }
  .sugg-list{
    padding: 0 5px;
    .sugg-item{
      font-size: 12px;
      padding: 13px 0;
      border-bottom: 1px solid #efefef;
      display: flex;
      align-items: center;
      justify-content: space-between;
      .good_name{
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-left: 3px;
      }
     
    }
  }
  
  .history-box {
    padding: 0 5px;
  
    .history-title {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 40px;
      font-size: 13px;
      border-bottom: 1px solid #efefef;
    }
  
    .history-list {
      display: flex;
      flex-wrap: wrap;
  
      .uni-tag {
        margin-top: 5px;
        margin-right: 5px;
      }
    }
  }
</style>
